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2013-03-10 by freddy1771994
Hi, I found a cheap Emax I HD/SE Keyboard and bought it. The seller said that actually just the floppy drive is faulty. Obviously there're also other problems. http://www.flickr.com/photos/75453658@N08/8544202201/in/photostream/lightbox/ Do you know why there is just one black bar in the display? Thank you for your help! Best regards!
2013-03-10 by Ted Summers
Reseat IC 13 EPROM first. On Mar 10, 2013, at 7:39 AM, freddy1771994 wrote: Hi, I found a cheap Emax I HD/SE Keyboard and bought it. The seller said that actually just the floppy drive is faulty. Obviously there're also other problems. http://www.flickr.com/photos/75453658@N08/8544202201/in/photostream/lightbox/ Do you know why there is just one black bar in the display? Thank you for your help! Best regards! [Non-text portions of this message have been removed]
2013-03-10 by freddy1771994
Thank you for your answer, but it didn't help :/
2013-03-10 by Michael Wisbech
May I ask what does the light for select and Stop indicate ? they also lights on my Emax, when pressing All IC's down it often helps.
On 10-03-2013 16:54, Ted Summers wrote: > Reseat IC 13 EPROM first. > > > On Mar 10, 2013, at 7:39 AM, freddy1771994 wrote: > > Hi, > > I found a cheap Emax I HD/SE Keyboard and bought it. The seller said that actually just the floppy drive is faulty. > Obviously there're also other problems. > > http://www.flickr.com/photos/75453658@N08/8544202201/in/photostream/lightbox/ > > Do you know why there is just one black bar in the display? > > Thank you for your help! > Best regards! > > > > > >
2013-03-11 by freddy1771994
Hi, the lights never stop to light. After having reseated all the chips the problem is still the same. Another aspect worth to be mentioned is that the HD is working every 5 seconds, as if it is loading something but it never works and restarts every 5 seconds. The upper display line is still dark. Do you guys have an idea? Thank you!!
2013-03-11 by Ted Summers
have you tried unhooking the HD and booting from floppy? It's a long shot, but maybe the SCSI controller on the Hard disk has gone bad and is hanging the bus. Just a thought. -T On Mon, Mar 11, 2013 at 8:38 AM, freddy1771994 <freddy1771994@...>wrote: > ** > > > Hi, > > the lights never stop to light. After having reseated all the chips the > problem is still the same. > > Another aspect worth to be mentioned is that the HD is working every 5 > seconds, as if it is loading something but it never works and restarts > every 5 seconds. > > The upper display line is still dark. > > Do you guys have an idea? > > Thank you!! > > > [Non-text portions of this message have been removed]
2013-03-11 by freddy1771994
Hi, thanks, it didn't help. The floppy drive is dead and the display is still black and the LEDs are still on all the time... hmmm... What might cause its behaviour?.... Thanks for your help!!!
2013-03-11 by Ted Summers
Where the floppy drive is dead too- I don't know what the result would be on the display. You sure the floppy cable isn't hooked up backwards or offset by a pin? Otherwise, my suggestion is to send to Jammie in UK, or send to me if in US. Don't have any other ideas. -T On Mon, Mar 11, 2013 at 9:03 AM, freddy1771994 <freddy1771994@...>wrote: > ** > > > Hi, > thanks, it didn't help. The floppy drive is dead and the display is still > black and the LEDs are still on all the time... > > hmmm... What might cause its behaviour?.... > > Thanks for your help!!! > > > [Non-text portions of this message have been removed]
2013-03-11 by freddy1771994
Maybe the problem is simple that's why I took two photo of the unit upside down http://www.flickr.com/photos/75453658@N08/8548488449/in/photostream/lightbox/ http://www.flickr.com/photos/75453658@N08/8549586616/in/photostream/lightbox/ Otherwise I will have to send it to jammie if he thinks he knows what to do. Thank you for all your ideas and for your help!!
2013-03-11 by Ted Summers
Your floppy is hooked up backwards. The STRIPE always goes to the back of the UNIT. Stripe denotes PIN 1 of the connection and PIN 1 is towards the back of the unit. Same is true for SCSI cable. -T On Mon, Mar 11, 2013 at 10:14 AM, freddy1771994 <freddy1771994@...>wrote: > ** > > > Maybe the problem is simple that's why I took two photo of the unit upside > down > > > http://www.flickr.com/photos/75453658@N08/8548488449/in/photostream/lightbox/ > > > http://www.flickr.com/photos/75453658@N08/8549586616/in/photostream/lightbox/ > > Otherwise I will have to send it to jammie if he thinks he knows what to > do. > > Thank you for all your ideas and for your help!! > > > [Non-text portions of this message have been removed]
2013-03-11 by freddy1771994
Ok thank you, but it still doesnt work. Now only the preset definition and the analog proceccing LEDs shine. The display is still black in the top row :/ Besides the HD has stopped to work endlessly. Nevertheless no buttons react. Thanks fpr your help.
2013-03-11 by emuemax92
Hi, It's important to know that Emax will tell you what's wrong through it's leds. What I can tell about the leds (picture of the blank LED's which is normal because there is no boot) is that there is a faulty connection to the E-Chip register(Sequencer LED) and faulty to write a byte into it's E-Chip RAM (Master LED). This indicates that it has something todo with the E-Chip. On the Emax II all testing and function data is regulated through LSI#2 chip. The same is done through the E-Chip of the Emax I. Do make sure to disconnect every cable before you start to work on the Emax. I don't own an Emax I but Emax II so you'll have to look if the E-chip is removable and clean contacts with pure alcohol if possible. Than make sure everything is dried up and reseat the E-chip. Hopefully it will boot, otherwise it might be a faulty E-chip or bad solder joints to the E-chip (reheat with heater). Kind regards, Frank --- In emax@yahoogroups.com, "freddy1771994" <freddy1771994@...> wrote:
> > Hi, > > I found a cheap Emax I HD/SE Keyboard and bought it. The seller said that actually just the floppy drive is faulty. > Obviously there're also other problems. > > http://www.flickr.com/photos/75453658@N08/8544202201/in/photostream/lightbox/ > > Do you know why there is just one black bar in the display? > > Thank you for your help! > Best regards! >
2013-03-11 by emuemax92
Hi, Preset Definition LED: Wrote command to 1772 Floppy Disk Controller to restore head on the drive, but the drive never reached track 0, or the 1772 never responded. Analog Processing LED: Unable to load software from disk. Kind regards, Frank --- In emax@yahoogroups.com, "freddy1771994" <freddy1771994@...> wrote:
> > Ok thank you, but it still doesnt work. > > Now only the preset definition and the analog proceccing LEDs shine. The display is still black in the top row :/ > > Besides the HD has stopped to work endlessly. Nevertheless no buttons react. > > Thanks fpr your help. >
2013-03-11 by Ted Summers
Two lights at the bottom of the row indicate BAD FLOPPY DRIVE / DRIVE disconnected / misconnected. If you have a floppy drive that cannot be set DS0, this will also show the 2 lights.... Since you had it hooked backwards, it is also possible you blew out the floppy drive control circuit on the Emax. But that doesn't explain the display itself. It is also possible that your display has gone bad... My experience is that a bad connection to EPROM or the display connector itself can result in this behavior of the display. Basically- it is my opinion that you have multiple issues, not just one issue resulting in the behavior. If you have another working emax (1 or 2), you could try the display on it without causing any harm. If display works elsewheres, then now you are back to logic board having the issue. Same could be said of floppy drive- try it elsewheres if possible. -T On Mon, Mar 11, 2013 at 2:46 PM, freddy1771994 <freddy1771994@...>wrote: > ** > > > Ok thank you, but it still doesnt work. > > Now only the preset definition and the analog proceccing LEDs shine. The > display is still black in the top row :/ > > Besides the HD has stopped to work endlessly. Nevertheless no buttons > react. > > Thanks fpr your help. > > > [Non-text portions of this message have been removed]
2013-03-11 by emuemax92
Does the diskdrive led light up? --- In emax@yahoogroups.com, "freddy1771994" <freddy1771994@...> wrote:
> > Ok thank you, but it still doesnt work. > > Now only the preset definition and the analog proceccing LEDs shine. The display is still black in the top row :/ > > Besides the HD has stopped to work endlessly. Nevertheless no buttons react. > > Thanks fpr your help. >
2013-03-11 by freddy1771994
Hi thanks for your long and fantastic answer. I will check it all tomorrow because it is already late here. Yes the light continously lights...